Axial CT in brain window (80, 40), showing subtle low attenuation in the left ocipital lobe:
CT brain in stroke window (35, 35) showing the infarct better.
Axial T2 showing the infarct clearly.
DWI showing acute infarct:
MRA showing left vertebral artery occlusion:
Axial fat sat T1 showing the thrombus: